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Diffstat (limited to '')
-rw-r--r-- | test/fixedbugs/issue52127.go | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/test/fixedbugs/issue52127.go b/test/fixedbugs/issue52127.go new file mode 100644 index 0000000..7738c3f --- /dev/null +++ b/test/fixedbugs/issue52127.go @@ -0,0 +1,62 @@ +// run +//go:build !js +// +build !js + +// Copyright 2022 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Issue 52127: Too many syntax errors in many files can +// cause deadlocks instead of displaying error messages +// correctly. + +package main + +import ( + "bytes" + "fmt" + "os" + "os/exec" + "path/filepath" +) + +func main() { + dir, err := os.MkdirTemp("", "issue52127") + if err != nil { + panic(err) + } + defer os.RemoveAll(dir) + + args := []string{"go", "build"} + write := func(prefix string, i int, data string) { + filename := filepath.Join(dir, fmt.Sprintf("%s%d.go", prefix, i)) + if err := os.WriteFile(filename, []byte(data), 0o644); err != nil { + panic(err) + } + args = append(args, filename) + } + + for i := 0; i < 100; i++ { + write("a", i, `package p +`) + } + for i := 0; i < 100; i++ { + write("b", i, `package p +var +var +var +var +var +`) + } + + cmd := exec.Command(args[0], args[1:]...) + output, err := cmd.CombinedOutput() + if err == nil { + panic("compile succeeded unexpectedly") + } + if !bytes.Contains(output, []byte("syntax error:")) { + panic(fmt.Sprintf(`missing "syntax error" in compiler output; got: +%s`, output)) + } +}
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